Block Settings users!

I wonder if you can lock the configuration options for users of the network because the user does not logam in Spark.

We have the Openfire server installed on a Linux (CentOS) and is linked to AD, all the company’s machines have installed the Spark, the problem is that not all users are logged into the instant messenger. We leave unless the user and automatic password, because as pulling the AD information, need not be putting username and password, but the problem is that they are disconnecting every day!

Wonder: Its block everything we configuration or take the option to disconnect to the end user? Help me and I believe this helps someone else too.